Adding-machine.



N. WHITE.'

ADDING MACHINE.

APPLIOATION FILED Humo, 1912.

1,046,521 Patented Dec. 10, 1912.

7 SHEETS-SHEET 1.

,hue/757" m A; QZ@

N. WHITE.

ADDING MACHINE.

uPLIoATIoN FILED Humo, 1912.

1,046,521 Patented Dec. 1o, 1912.

7 SHEETS-SHEET 2.

N. WHITE.

ADDING MACHINE.

APPLIcATIoN FILED MAB. 3o, 1912.

Patented Deo. 10, 1912.

7 SHEETS-SHEET 3.

N. WHITE.

ADDING MACHINE.

APPLIOATION FILED Mue, 1912.

1,046,521. Patented Dec. 10,1912.

7 SHEETS-SHEET 4.

f /Eg 3990 N N. WHITE.

ADDING MACHINE.

APPLIOATION FILED 11,511.30, 1912.

Patented Deo. 10, 1912.

7 SHEETS--SHEET 5.

N. WHITE.

ADDING MACHINE.

APPLICATION FILED Immo, 1912.

1,046,521,- Patented Dec. 10, 1912.

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N. WHITE.

ADDING MACHINE.

APPLICATION FILED MAILSO, 1912.

Patented Dec. 10, 1912.

I SHEETS-SHEET 7.

'UNITED STATES -Param* oFFioE.

NELSON WHITE, OF PORTLAND, OREGON, ASSIGNOR TO BURROUGHS ADDING MACHINE COMPANY, OF DETROIT, MICHIGAN A CORPORATION OF MICHIGAN.

ADDING-MACHINE.

Specication of Letters Patent.

Patented Dec. 10, 1912.

Application led March 30, 1912. Serial No. 687,372.

To all 'whom it may concern:

Be it known that I, NELSON WHITE, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Adding-Machines, of which the following is a specification. Q

The present invention relates more particularl to adding machines equipped with means iibr accom lishing subtraction by d1- rect process as distinguished from the common method consisting in addition of complemental amounts.

The main object of the present invention is to provide an improved way of taking what is known as a negative. total. Where 'an adding machine is used for subtraction purposes it is highly desirable to be able to print the true amount by which a minuend has been exceeded. For example where machines are used in banks it is a distinct advantage to be able to readily ascertain the amount by which a depositor may have overdrawn his account. The problem of procuring this so-called negative total is not unfamiliar. The' chief diiiiculty experienced in this regard where adding machines have been equipped for performing subtraction by direct process, has been that a totaling operation performed under thesub-y traction adjustment, shows a, negative total which is a' unit short. I am familiar with a machine which has been made the subject of a separate application and contains an equlpment for making up this shortage preliminary to the performance of a totaling operation. Thus in that'machine there'is provided a special key which when operated causes the subtraction wheel in the lowest order to advance a step thereby adding to the negative total the necessary unit so that upon performing a totaling operation in the customary way, with the subtraction wheels in direct operative relation to the customary racks, the correct negative total will be printed. My present invention does away with the necessity for any special preliminary operation in order to supply the additional unit. The present machine is automatic in this regard being so equipped that if the minuend is exceeded in subtraction controlling devices will come into play for causing one or more type carriers to partake of eXtra movement in a totaling operation. The units type carrier will always partake of such movement in a negative totaling operation, and others will if the extra movement in the units order calls for a transfer.

In t-he drawings which form art of this specification and illustrate a pre erred form of embodiment of the invention, Figure 1 illustrates in left side elevation a machine of the W'ell known Burroughs type equipped with mechanism for cai-ying out the present invention, the inclosing casing being omitted as well as the left frame piece, and cer-l tain pivot studs and cross rorls and shafts being shown in section; Fig. 9 is a front elevation of the accumulating orregistering section of the machine; Fig. 3 is a rightside elevation of the same character as the left side elevation of Fig. 1; Figs. tand 5 are right side elevations similar to Fig. 3 but not including as much of the machine and being on a larger lscale and further differing in showing changed conditions both as compared with Fig. 3 and as compared with each other; Fig. 6 is a horizontal section taken on line 6-6 of Fig. 4; Figs. 7, 8 and 9 are similar left side elevations illustrating varying conditio-ns having to do with control of the total key in conjunction with the setting of the registering mechanism for a plus or minus result; Fig. 10 is a top plan view of part of the keyboard and Fig. 11 is a vertical cross section on line 11.-11 ofFig. 10.

The numeral 291 designates the customary amount keys and 610 the segmental racks whose excursions are measured by stops of the familiar character set by depression of said keys.'

The numeral 611 designates levers of the usual kind which at their forward ends have slot, pin and spring connections with the racks respectively and at their rear ends carry type plates 618. In the present instance the lowermost type plate specially designated 618a has an additional type 618b for the' printing of a cipher in 'instances where the extra movement in a negative totaling operation carries a type carrier a step beyond the 9 position. A corresponding variation from the ordinary construction is to be found in elongation of the rack slots a the same being twice the usual length though normally relative movement between racks and type carriers is t-he same as usual, to wit a single step for transfer purposes and' for moving the regular cipher type to the (ifi rinting line. The means for permitting urther relative movement between type carriers and racks Will be hereinafter pointed out. Pinions designated 916 co rate with the racks 610 for 4purposes of a dition and ositive totalin the same as in the well Known Burroug s machine but in the present'instance there is another set of pinions 916c which are constantly in mesh withthe pinions 916, and the two sets of plnions are carried ina cradle which pivots in a rocking frame of the character of the usual rocking frame 'for meshing-and unmeshing pinions and racks.

\ The numeral 910i'I designates the leftside piece'of the main rocking frame secured to the usual rock shaft 900,-- andthe numeral 9L designates the left side piece' of the cradle. By setting the latter in one position orthe other the upper pinions 916 Aor the lower pinions 916. may be caused to assume direct coperative relation with the racks. Under one adjustment the upper set of pinions will add and yield totals the same as in i the ordinary construction of Burroughs adding machine. In the other adjustment the lower pinions 916c will similarly coperate with the racks but the pinions 916 will then dition and in the other case the same trans-.

fer action will belfor borrowing in subtraction.

The cradle is set in one position or the other through the medium of a lever 10 which protrudes through the keyboard plates 212213 being pivoted upon a frame stud 10 and havin at its lower end a rear- Wardly' extending ranch 10b with a cam slot 10c for effecting the rocking of the cradle. A vertical bar 20 is slidlngly engaged with the said frame stud 10*3L and carries a `roller stud 19 in said cam slot. Said bar at its lower end is coupled to a bell crank lever 21 which is connected by a link 22 with the cradle as shown in Fig. 1. A lever 15 loose on the rock shaft 900 locks the cradle in its two positions by reason of engagement with notches 9f and 9g in a se mental forward extension of the left si 'e piece 9L of the cradle. Said arm extends rearwardly of the shaft 900 and has a double acting cam portion 15b which cooperates with a stud 10g on the rear branch 10. of the `lever 10.v When the latter is thrown one way the stud acts against the front side of the cam to A`shift the arm andv unlock the cradle, the stud then passing to the rear edge of the cam so that the spring 18 applied to the arm may cause the latter f to again lock the cradle. When the lever 10 is thrown the other way its stud acts u n the rear ed of the cam with a"-like e ect. A forward y extending branch 10" of the lever 10 has a double acting cam portion 10t 75 to coperate with a roller 14 on the cradle pivot. This is for the purpose of disconnecting pinions from racks -preliminary to rocking of the cradle,A so as to avoid binding between the pinions and racks. A spring 23 applied to the main rocking frame returns the latter after the cam 10t has so acted and after the cradle has been rocked through the connections before described. The enlargements at the4 ends of the cam slot 10h allow for the movement of these 1 connections during the preliminary shift of the main rocking frame.

The total key 265 is of the usual type and I so are the connections controlled b it comprising the pitman 914 hbranc ed and notched at its forward end for engagement with studs on the frame piece 916IJ above and below the shaft 900.

It will be understood that the two sets of pinions bear complemental relation to each other, the lower pinions at all times registering in effect the complement of whatever the upper pinions may be registering. vOwing to the necessary relation-of transfer devices, however, the complemental amountV will be one unit short of the true complement. Consequently the mere taking of a total with the lower pinions in direct cooperative relation to the racks would notk lprint the f:orrect negative total.

Referring next to Figs. 3 to 6there is pivoted upon the 'lower partof each rack 610 a latohing lever A which is connected by a spring a3 to the stud A4 of thel` associated lever 611, said spring normally engaging the upper portion of the latch with said stud andppositioning the shoulder a2 of the latch under said stud so as to limit relative movement of lever and rack to that which is customary as before explained. In a negative totaling or sub-totaling opera-tion the latch on the units order rack will always be displaced so as to permit extra movement of the units lever for the purpose of raising the negative total in the setting upV of the same by the types at the rear of the machine. Whether or not extra movement occurs in other orders will depend upon whether the extra movement in the units order calls for a transfer as where the units wheel 916c isinedect registering 9, the companion wheel 916 being at zero as illustrated in Fig. 4. The lower arm of each latch lever A carries a roller stud a* and that of the units latch lever cooperates with an arm D which is jonrnaled upon a cross rod C extending between the side frame pieces of the machine. Said arm D and other simillar arms presently to be pointed out are normally upheld' by the cross rod E of a bail whose side arms E and E2 are secured to the rock shaft C. The latter has a forward extension E3 whereby, through connections hereinafter described, the bail will be lowered in the depression of the total key. The bail rod E is connected by a spring ci to the arm D and similarly connected to like arms in other orders. The arm D'is turned upwardly at its rear end and has a cam extremity d for acting upon the roller a* but normally stands above the same and so long as this condition obtains the latch lever A will be unaffected by said cam. When the said arm is drawn downward; however, by the bail rod E the'cam acts upon the roller and shifts the latch lever moving its shoulder a2 out of line with the stud A* as illustrated in Fig. 5 so that in an ensuing totaling operation the units type-carrying lever may move au eXtra step for setting up a correct negative total. Alongside the arm D there is journaled upon the rock shaft C a yoke D which at the right hand side, Fig. 6, has an arm D2 extending forward and upward and terminating in a laterally turned and rearwardly projecting linger fl in the plane of a dis 916a secured to the units inion 916 said disk being notched in its-periphery as shown at b at such location that when the wheel 916 is at zero the notch will be in line with the finger d4 as shown in Fig. 4. The left hand side of said. yoke has an arm D3 similar to the arm D and related to the latch lev D 1s relatedto the latch lever of the units order. Furthermore, this arm D3 is connected to the bail rod E by a spring d. The arm D3 extends forward of the shaft -C and has a laterally' turned portion (lf which extends behind an arm D4 of another yoke which is substantially a duplicate of the yoke already described, the said arm D4 having a finger to cooperate with a notch disk carried by the tens pinion 916 and this second yoke having a cam arm D5 to cooperate with the latch lever of the hundreds order. It will be understood that if the units wheel 916 is at zero the associated wheel 916c will in effect be registering 9 as the complement and hence the addition of-an increment of movement to the units type carrier would take the lower zero type 61Sb to the printing line and this Would call for a transfer to the next order. in such. case the finger dof the arm D2 enters the notch b so that the yoke takes its full movement andthe cam arm D3 trips the tens latch lever and consequently the tens of the tens order the same as the arm type carrier also partakes of extra movement. If it should happen that the tens Wheel 916 was also standing at zero lthe full retreat of' the laterally turned portion or ear rl of the yoke D would permit the tens yoke to also rock fully and unlatch the hundreds type carrier, the finger of this yoke entering the notch of the disk in the tens wheel. The yoke construction is carried out to the highest order so that such a transfer action can take place all the way across if the situation calls for it. It will be understood that though certain Wheels 916 maystand at z ero there should not be a transfer action but that this should be controlled by the lower order wheels. The ears (Z7 serveto block movement of bails notwithstanding their fingers may be alined with zero notches in the disks. For example if the additional increment of movement of the units type carrier was not from nine to zero and therefore the units wheel916 was not at zero, the finger Z4 would strike against the periphery of the disk 916EL and the bail D would not rock far enough to trip thetens latch lever.

The connections for operating the bail are4 of the following description: The arm E3 is 4connected by a vertical link F with the forwardly extending arm of a bell crank lever F', a spring f being applied to said link and normally holding the bail up and the said bell crank lever in contact with a cross rod 205 as illustrated in Fig. 3. The upwardly extending arm of said bell crank has a' stud f which is adapted to be engaged by a hook g on the forward end of a lever G pivoted upon thecross rod of the usual rack releasing bail' of the total key system, said bail comprising as usual side pieces 216R and 216L though n the present instance radius links 216a and 216b are preferably employed to support the bail at the forward end. Whether the lever G connects with the bell crank F depends upon the adjustmentof the lever 10. If the upper end of the latter is rearward, denoting an adding adjustment, the lever G will be disconnected from said bell crank as illustrated in Fig. 3. If the upper end of the lever l0 is forward the hook g will engage the stud f as illustrated in Fig. 5. The controlling connections here comprise a short bifurcated arm G3 secured to the left hand end of a rock shaft 200 as shown in Fig. 1 and embracing a stud 10 on the lever 10 so that in the shifting of the latter the shaft will be rocked.. There is secured to the right hand end of the shaft 200 an abutment plate and cam piece H, Figs. 3, 4 and 5 which has a concentric edge h at the rear portion nearer to the shaft than a concentric edge k at the upper lport-ion, and between thesel concentric portions there is a cam ed e h2. The piece H coperates with a stud z at the bend of an elbow-shaped arm I of a lever pivoted upon a frame stud 200. The down-turned end portion of this arm I has a stud I which engages a bifurcated rear arm of the lever G. Whenthe controlling lever 10 is in the addlng posit-ion as illustrated in the adding position, Fig. 3, the outer circumferential edge h of the 'abutment piece H is presented to thelstud z so that the arm I is held down agalnst the stress of the spring I2 tending to raise 1t. In consequence the lever G is elevated on the forward side .of its pivot and its hook g disconnected from the stud f. On the other hand when the controlling lever 10 is in the subtracting position as illustrated in Figs. 4 and 5 the inner circumferential edge h of the abutment piece H is presented to the stud z' so that the arm I may take up a more elevated position than before and the lever G will be lowered forward of its pivot and its hook engaged with the stud f. In such case it will be obvious that depression of the total key in drawing upon the bail side piece or link 216R will move the lever G rearward and rock the bell crank F2 and lower the bail rod E as illustrated in Fig. 5

'thereby effecting unlatching of one or more of the levers 611 with the result before described.

Inasmuch as one or more of the fingered l voke arms may be in the notches'of the disks 916a when the operation starts with the total i key depressed, it is essential that there be moves.

a restoration of yokes before the wheels begin to turn. Therefore the lever of whichthe arm I forms a part has another arm on the other side of its pivot which arm is of crescent shape in large part but at the rear has a cam portion i3 to coact wit-h a stud 311a on t-he full stroke sector`311. The crescent portion thereof has an under edge z" which will be traversed by the stud 311a under normal conditions (Fig. 3) without effect upon the lever. By normally is here meant a condition with the controlling lever 10 in the adding position. I-f the4 controlling-lever 10 isin/ a subtracting position as illustrated in Fig. 4 the cam portion s of the lever will stand inthe path of the stud 311g' and therefore the lever will be rocked very shortly after the full stroke sector 311 It will be understood that this full stroke sector is secured to the handle shaft of the machine and so starts to move immediately thehandle is pulled. Of course if turned backward when the downward movei The upper sides ment of the racks begins. of the notches b, however, are preferably made oblique so that the turning of the wheels may start before the fingers are completely withdrawn. This speedy restoration of the parts does not disturb the intended effect in adding increments of movement to type carriers, notwithstanding itV involves freeing the latch levers A from the restraining influence of the cam arms. By t-he time this release and restoration occurs the studs A* of any type carrying levers that have been unlatched will have passed down below the shoulders 'a2 so that even though the release of latches occurs before the type carriers have partake'n of the full extent of movement that movement will be gone through with and the type properly set up. Of course when thetype carrying leversv are swung upward 'in the usual manner by the restoring frame or bail 613 said studs A4 will be carried past the shoulders a2 and the latch levers will then spring back to 'i total becomes negat-ive the highest orderwheel 916 necessarily turns backward past the zero position and the highest order wheel 916c correspondingly advances in the opposite direction so that its transfer cam `921 takes effect, and then4 if in continued operations the tota-l again becomes positive t-hls means that this 'cam 92-1 goes back past the zero position and the cam 920 of the highest order wheel 916 advances through its effective arc of movement. The operability of the totaling system is therefore put under control of these two transfer cams. This calls for some modification of the transfer mechanism in the highest order as compared with that in lower orders. As. Abefore pointed out the transfer pawl 413 in the lower orders simply has the downward extension with the additional foot for coperation with the lower wheel. In the highest order separate transfer pawls are employed for the two wheels. The numeral 413 designates the pivoted transfer pawl for the upper wheel suspended from the same cross rod that the other transfer pawls 413 journal upon and having a foot of the usual kind with which the cam 920 coperates. On a frame stud j located at a point below the said journal rod there is pivoted a transfer pawl 4131 having a foot with which the cam 921 coperates. The two transfer pawls are connecte by a spring 413c which swings both of them toward their respective transfer cams the movement being limited by abutment of legs on the two pawls with the cross rod 205. Of course these are not strictly speaking transfer pawls because the have no function to perform as such since there is no higher wheel to which a transfer is made. They do perform the same functions as the one-piece pawls in the matter of stopping backward rotation of wheels. Then they.

perform the additional function of compelling proper use of the total key in the matter of positive and negative tot-als. There is pivoted upon the stud j an arm J having at its forward end oppositelyl extending branches j and `7'2 with laterally projecting studs j3 and j* to coact respectively with the rear edges of the pawls 413 and 413. There is lost motion to provide for shifting of the arm J in one direction by one pawl and in the opposite direction bv the other pawl. The positive' total adjustment is illustrated in Figs.'7 and 8 wherein it will be observed that the stud ja is in contact with the rear edge of the pawl l113b whereas the stud j* is spaced from the rear edge of the pawl 4133. Fig. 9 represents the minus or negative total condition wherein the stud j* is in contact with the rear edge of the pawl 413* and the stud 7'3 is spaced from the pawl 413". The rear end of the arm J carries the stud j which engages the projecting end of a spring K wound around t-he stud 10a said project-ing end having notches in which the study"s seats for the purpose of insuring its stability under the two different adjustments. The stud 7'5 engages the front ed e of the downwardly extending arm M og a locking lever pivoted to the controlling lever 10 and having an upwardly extending arm M whose end edge is adapted to coperate with studs m and m projecting from the total key bell crank lever 227 and spaced apart lengthwise the substantially horizontal arm of this bell crank lever. The `lower arm M of the locking lever and the arm J are connected by a spring n which is applied at one end to the stud j and at the other to a stud on the arm M. It will be obvious that the angular position of the locking lever with relation to the controlling lever 10 depends upon the position of the arm J. The relation of these parts and the relation between the arm M and the studs m and m are such that if the total is positive or more 4strictly speaking if the total has not gone into negative, and the handle 10 is in the adding position as illustrated in Fig. 7 the rear stud m is just back of the end of the arm M so that the total key may be depressed, whereas if under such conditions the controlling lever is moved to the subtracting position as in Fig. 8 the end of the arm M will be carried under the stud m locking out the total lever. If

now the total goes into negative the swinging back of the pawl 413" by thecam 921 of the spring n swings the locking lever so that the end of its upper arm M retreats to theposition shown in Fig. 9 thus passing from 'under the stud m so that thetotal key can then be depressed for the taking of a negative total. Now if the controlling lever l0 is moved to the adding position the end of the arm M will take up a' position directly below the stud m preventingthe de.- pression of the total key. However, if the total becomes position thereafter the arm J will be rocked rearward and the locking lever shifted to the position shown in Fig. 7 so that the tot-al key is free for the taking ofa positive total. It will be understood of course that under either adjustment there is sucient lost motion between. the stud ja or the stud j* and the associated pawl to permit movement ofthe latter in another passing of ythe transfer cam.

Inasmuch'as occasion will arise for clearing the upper wheels while a negative total condition obtains, I have provided a slide y piece R, Fig. 10, which is fitted upon an index plate Q the latter secu-red to the upper keyboard plate and slotted for the passage of a finger R therethrough, Fig. 7 to coperate with a stud 1' in a plate M2 fastened to the arm M. The slide piece R is slotted to embrace a guiding screw 1" and has a finger piece r3 by which to manipulate it. I-t will be obvious that under a negative total condition'but with the lever 10 rearward'forward movement of the slide piece R will shift the arm M so as to free the total key.

It is desirable to provide a visual indicator from which the operator can readily see whether a negative or positive total condition obtains. To this end the plate M2 which is secured to the arm M has -a segmental upper portion with a ilange to work under keyboard plate 213 which flange is inscribed to denote t-he condition of the machine as by the letters N and 1). The keyboard plate is open under the indexing plate Q, and the latter made with an aperture through which .the indicating letter may show. vInasmuch as the positive indication should show under both adjustments of the lever 10 if the condition is a positive one within the machine, and `similarly the negative indication should show in both positions ofthe lever, the flange of the plate M2 is inscribed at two places with the letter P and at two places with the' .letter N as denoted in Figs. 7, 8and 9.

The letters here appear on the side of the plate merely to show their location on the fla-nge with relation tothe end' of the arm M.

I claim: 1. In a machine of the character described,

.rocks thearm J which through the medium reversing the order of engagement and the combination of a series 'ofreciprocable type carriers; racks movable therewith and to a limited extent relatively thereto; two sets of Igear wheels intermeshed in pairs and separately. engageable with the racks; combined transfer and zero-setting mechanisms of duplex character to provide for both .carrying and borrowing through movement of racks relative to type carriers, the two sets of wheels bea-ring 'a complemental relation to each other; means for effecting engagement of either set of wheels with the racks during movement of latter in one direction and disengagement therefrom during their movement in the opposite direction,- to add upon one -set of wheels or subtract therefrom according to which set is coperating directly with theracks; means (for 1sengagement between either-set of wheels andthe racks for zero setting purposes; and means for automatically as anl incident to a totaling operation adding an increment of movement to one or more type carriers beyond that permitted by zero setting of one set of wheels, whereby to raise by a. unit tlie complemental amount registered by that set, such automatic means being under the control of the highest order wheel of said set.

2. In a machine of the character described,

. the combination of a series of reciprocable type carriers; racks movable therewith and to a limited extent relatively thereto; two sets of gear wheels intermeshed in pairs and separately engageable with the racks; combined transfer and zero-setting mechanism of duplex character to provide for both carrying and borrowing through movement of racks relative to type carriers, the two sets of wheels bearing a complemental relation to each other; means for effecting engagement of either set of wheels with the racks during movement-of latter in one direction and disengagement therefrom durin their movement in the opposite direction,-to add upon one set of wheels or subtract therefrom according to which set is cooperating directly with the racks; means for reversing the order of engagement and disengagement between either set of wheels and the racks for zero setting purposes; and means for automatically as an incident to a totaling operation adding an increment of movement to one or more type carriers beyond that permitted by zero setting of one set of wheels, whereby to raise by a unit the complemental amount registered by that set by a unit, such automatic means being under the control of the highest order wheel of said set; and means also under control of said Wheel for enabling and disabling the means for reversing the order of engagement and disengagement of wheels and racks to prevent operation of said means when the4 setting purposes;

inpairs and separately engageable with the racks; combined transfer and zero-setting mechanism of duplex character to provide for both carrying :and borrowing through movement of racks relative to type carriers, the two sets of wheels bea-ring a complemental relation to each other; means for effecting engagement of either set of wheels with the raclrs during movement of latter 1n one dlrectlon 'and disengagement therefrom during their moyement in the opposite direct-lon, to add upon one set of wheels or subtract therefrom according to which set is coperating directly with'the racks; means for reverslng the order of engagement and disenga ement between either set of -wheels an the racks for zero means for automatically as an incident to a totaling operation adding an increment of movement to the lowest order type-carrier, and transfer devices to carry such movement to a higher order type carrier.

'4. In a machine of the character described, the combination of a series of ref ciprocable type carriers; racks movable therewith and to a limited extent relatively. thereto; twosets of gear wheels intermeshed in pairs and separately engageable with the racks; combined transfer and zero-setting mechanism of duplex character to provide for both carrying and borrowing through movement of racks relative to type carriers; the two sets of wheels bearing a complemental relation to each other; means for effecting engagement of either set of Wheels with the racks during movement of latter .in one direct-ion and disengagement therefrom during their movement in the opposite direction,-to -add upon one set of wheels or subtract therefrom according to which set' is coperating directly with the racks;

means for reversingv the order of engagement and dlsengagement between either set of wheels and the racks for zero-setting purposes; latches normally restricting relative Amovement between type carriers and racks;

and latch-displacing mechanism under contro of said means for reversing the order of engagement and disengagement of racks and wheels, and also under control of the wheels themselves, said mechanism including transfer devices to carry extra move` ment of racks from lower to higher orders.

5. In a machine of the character described, the combination of a series of reciprocable type carriers; racks movableJlSf) the two sets of wheels bearing a comple-.

mental relation to each other; means for effecting engagement of either set of wheels with the racks during movement of latter in one direction and disengagement therefrom during their movement in the opposite di1'ection,to add upon one set of wheels or subtract therefrom according to which set iscoperating directly with the racks; a tot-al key andconnectionsfor reversing the order of engagement and disengagement be# tween racks and wheels; latc es for normally restricting relative movement between racks and type carriers; latch displacing arms; a bail normally ret-racting the latter; operative connections between the ball and the total key; notched disks turning with the wheels; arms with portions for entering the notches of said disks, said arms being connected with aforesaid latch-displacing arms respective-ly, the disk-engaging arm of a lower order being connected to the latch displacing arm of the next higher order and the latter arm in turn controlling the disk-engaging arm of its own order.

6. In a machine of the character de-` scribed, the combination of a series of reciprocable type carriers; racks movable therewith and to' a limited extent relatively thereto; two sets of gear wheels intermeshed' in pairs and separately engageable w1th the racks; combined transfer and zero-setting mechanism of duplex character to provide for both carrying and borrowing through movement of racks relative to type carriers, the two sets of wheels bearing a complemental relation to eachother; means for effecting engagement of either set of wheels with the ,racks during movementl of latter in one direction and disengagement therefrom during their movement in the opposite direction,-to add upon one set of wheels or subtract therefrom according to which set is coperating directly with the racks; a total key and connections for reu a versmg the order of engagement and disengagement between racks and wheels;

latches for normally. restricting relative movement between racks and type carriers; latch displacing arms; a bail normally retracting the latter and spuug-connected thereto; o erative connections between the bail and't e total key; notched disks turning with the wheels; arms with portions for entering the notches of said disks, said arms being connected with 'aforesaid latch-displacing arms respectively, the disk-engagmg arm of a lower order being connected to the latch displacing armA of the next? higher order and the latter arm in turn controlling the disk-engaging arm of its own order.

- 7. In a machine of the character described, the combination of a series of reciprocable type carriers; racks movable therewith and to a limited extent relatively thereto; two sets of gear wheels intermeshed in pairs and ,separately engageable with the racks; combined transfer and zero-setting mechanism of duplex character to rovide for both carrying and borrowing tlirough movement of racks relative to type carriers, the two sets of wheels bearing a complemental relation to' each other; means for eecting engagement of either set of wheels with the racks during movement of latter in one direction and disengagement therefrom during their movement in the ,opposite di1'ection,-to add uponone set of wheels or subtract therefrom according to which set is cooperating directly with the racks; a total key and connections for reversing the orderof engagement and disengagement between racks and wheels; latches for normally restricting relative movement between racks and type carriers; latch displacing arms; a bail normally retracting the latter; operative connections between the bail and the total key including a coupling controlled by the means for determining which set of wheels shall coperate directly with the racks; notchedv disks turning with the wheels; arms with portions for entering the notches of said disks, said arms being connected with aforesaid latch-displacing arms respectively, the disk-engaging arm of a lower order being connected to the latch displacing arm of the next higher order and the latter arm in turn controlling the disk-engaging arm of its own order; a prime mover; and means operated thereby for uncoupling the connections between the total key and the bail.J

8. ,In a machinel of the character described,

the combination of a series of reciprocable type carriers; racks movable therewith and to a limited extent relatively thereto; two

'sets of gear wheels intermeshed in pai-rs and separately engageable with the racks; combined transfer and zero-setting mechanism of duplex character to provide for both car rying and borrowing through movement of racks relative to type carriers, the two sets of wheels bearing a complemental relation to each other; means for effecting engagement of either set of wheels with the racks during movement of latter in one direction and disengagement therefrom during-their movement in the opposite direction,-to add upon one set of wheels or subtract therefrom according to which set is coperating directly with the racks; a total key and connections for reversing the order of engage; ment and disengagement between racks and wheels; latches for normally restricting relative movement between racks and type carriers; latch` displacing arms; a bail normally retracting the latter; operative'conr' nections between the bail and the total key including a coupling and uncoupling member in the form of a lever controlled by the means for determining which set of wheels shall cooperate directl with the racks; 1o notched disks turning'with the wheels; arms with portions for entering the notches of said disks, said arms being connected with aforesaid latch-displacing arms respectively, the disk-engaging arm of a -lower order being connected to the latch displacing arm of the next higher order and the latter arm in turn controlling the disk-engaging arm of its own order; a prime mover; and means operated thereby for uncoupling the connections between the total key and the bail; said means comprising a lever engaged with the coupling and uncoupling lever and having a. cam portion for coaction with the prime mover.

9. In a machine of thecharacter described, the combination of a series of reciprocable type carriers; racks movable therewith and to a limited extent relatively thereto; two sets of gear wheels intermeshed in pairs and 30 separately engageable with the racks; combined transfer and zero-setting mechanism of duplex character to provide for both carrying .and borrowing through movement of racks relative to type/carriers, the two sets 35 of wheels bearing a complemental relation to each other; means for effecting engagement of either set of wheels with the racks during movement of latter in one direction and disengagement therefrom during their 40 movement in the opposite direction,-to add upon one set of wheels or subtract there- .from according to which set is cooperating directly with the racks; a total key and connections for reversing the order of lengagement and disengagement between racks and wheels; latches for normally restricting relative movement between racks and typey carriers; latch displacing arms; a bail normally retractlng the latter; operatlve connections between th'e bail and the total key including a coupling and uncoupling lever; notched disks turning with the wheels arms with portions for entering the notches of said disks, said arms being connected with aforesaid latch-displacing arms respectively.`

th'e disk-engaging arm of a lower order being connected to the latch displacing arm of the nextihigher order and the latter arm in turn controlling the disk-engagin arm of its own order; a prime mover; aever operatively engaged with the aforesaid coupling and uncoupling lever and having a cam portion coacting therewith and a differential abutment piece for coacting with said levers to couple or uncouple the aforelsaid connectionsil said abutment piece being controlled by t e means for determining which set of wheels shall directly cooperate -w-ith the racks.

10. In a machine ofthe character described, the combination of a series of reciprocable type carriers; racks movable therewith and to a limited extent relatively thereto; two sets of gear wheels intermeshed in airs and separately engageable with the rac s; combined transfer and zero-setting mechanisms of duplex character to provide for bothl carrying and borrowing through movement of racks relative to type carriers, the' two sets of wheels bearing a complemental relation to each other; means foreffecting engagement of either set of wheels with the racks during movement of latter in one ,direction and disengagement therefrdm during their movement in the opposite direction`,--to add upon one set of wheels or subtract therefrom according to which set is-coperating directly with the racks; a shiftable controlling member for determin-y ing which set of wheels shall be in direct cooperative relation with the racks; a total key and connections for reversing the order of engagement between wheels and racks; means for automatically as an incident to a totaling operation adding an increment of movement to one or more type carriers beyond that permitted by zero-setting of one set of wheels whereby to raise by a unit the complemental amount registered thereby;

a lock for the total key operated by the shift-able controlling member; and means for controlling said lock by the transfer mechanism associated with the pair of highest order wheels.

11. In a machine of the character described, the combination of a series of reciprocable type carriers; racks movable therewith and to a limited extent relatively thereto; two sets of gear wheels intermeshed in airs and separately engageable with the rac s; combined transfer and zero-setting mechanisms of duplex character to provide for both carrying and borrowing through movement of racks relative to type carriers, the two sets of wheels bearing a complemental relation to each other and there being. independently movable trip pawls for the two wheels of the highest order pair; means for effecting engagement of either set of wheels with the racks during movement of latter in one direction and disengagement therefrom during their movement in the opposite direction,-to add upon one set of wheels or subtract therefrom according to which set is cooperating directly with the racks; a shiftable controlling member for determining which set of wheels shall be in direct coperative relation with the racks; a total key and connections for reversing the order of engagement between 13a wheels and racks; means for automatically as an incidentto a totaling operation adding an 'increment of movement to one or more typc carriers beyond that permitted by` zero-setting of one set of wheels whereby to raise by a unit the complementall amount registered thereby; a lock for the total key operated by the shiftable controlling member; and means for controlling said lock by the aforesaid trip pawls.

12. ln a machine of thecharacter described, the combination ofca series of reciprocable type carriers; racks movable therewith and to a limited extent'relativc-ly thereto; two sets of gear wheels intermeslied in pairs and. separately engageable with 4the racks; combined transfer and Zero-setting mechanisms of duplex character to provide for botlrcarrying and-'borrowing through movement Aot` racksrelative to type' carriers', the two sets` :of wheels bearing acomplemental relation to yeach otherand there be-i ing independently]movabletrip pa-wls fon the two-wheel'sof the lii,g'l1f est l order air; means for effecting engageliientfl offelther set of wlleels'with the racksdiiring movement of "latte-r 'ih one `direction and disengagementtherefrom during their movement in the opposite ldirectiomfto laddupon one" set of wheel-s or 'subtracttherefrom `accord-l ing to which set-is coiwrating directly with the racks;.a totalkey lever andconn'ectioiis lsaid lever having spaced studs; a lever for determining which set of wheels shall be in direct cooperative relation with the racks;

a lock piece pivotally mounted onsaid latter lever and adapted to engageV eitherstud of the total-key lever; and a controlling arm.

for said' loc-k piece said arm set by the trip pawls in either of two positions'ac'eording pair passes the zero point. t

13. In a .machine of the-character'described, the' combination of' a seriesof reciproeable type carriers; racks .movable therewith and toa Vlimited extent relativelythere'- to; two sets of gear wheels intermeshed in` pairs and separately engageable with the racks; combined transfer andzero-set-ting mechanisms `of duplex character to. provide for both carrying and` borrowing 'through movement of racks relativejto" type carriers, the twosets :ofv wheels beariing-v a Ycomple-l mental relation -to each other and, there being independently ,movable 4trip pawls fo'r the two wheels lofthe highest order` pair;'.

means for effecting engagement-ofeither setI l 'i of wheels with the -ra'cks duringmovement. of latter in one dlrection anddlsengagement therefrom during their movementv in the opposite direction, to add upon one set of wheels or subtract therefrom according lto which set is coperating directly with the racks; a total key lever and connections said lever having spaced studs; a lever for determiningwhich set of wheels shall be in directcoperative relation with the racks; a lock-piece'pivotallyJnounted-on said latter lever and adapted to engage either stud of the total key lever; and a pivoted controlling arm forv said lockpiecei'yleldingly connected therewith atene end and branched at the other end and the branches equipped with studs on opposite sides of the pivot for c0- action Irespectively with the .two aforesaid trip pawls there being lost motion to provide for shifting of the controlling arm by eitherpawl. fl s 14. In a'machine, of the character dei scribed, the combination of a series of reciprocablef typev carriers; racks movable therewith and tota limited. extent :relatively thereto; two sets' offgear wheels .intermeshed in 'pairs andf'separatelyengageable with the racks; eombinedtransfe'r and zero-setting 'mechanisms 'of duplex character to provide L for both carrying'andborrowing through movementoffracls relative to type carriers, the twoset'sof; wheels bearing a complemental relationto each other and there be- '.ing independently movable trip pawls for the two wheels of the highest order pair;

the racks; a. ytotal key lever and connections to which of the wheels ofthe hlghest` order said -leverhaving spaced studs; `a lever for determining which set of `wheels shall be in direct 'coperati'verelation with the racks; ivo'tally mounted on said latter lever and 'a apted-to engage either stud of the' total key lever; a'pivoted Ycontrollin arm for said lock `pieceyieldingly connected therewith atone end andbranched at' the other end and the branches equipped with studson opposite sides ofthe pivot for c0- action respectivelywith the two aforesaid trip pawlsthe're being lost motion to provide for shifting-'of the controlling arm by 'either vpawl; and a spring to frictionally hol'dthe armin'its different positions.

' NELsoN wanessesvfy f. Norms. B Game, u

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